Valentin Vacherot, Monaco, def. Mariano Navone, Argentina, 6-3, 7-6 (4).

Nuno Borges, Portugal, def. Mika Brunold, Switzerland, 6-3, 6-1.

Daniel Altmaier, Germany, def. Juan Manuel Cerundolo, Argentina, 6-7 (5), 7-6 (4), 6-4.

Holger Rune, Denmark, def. Quentin Halys, France, 6-4, 6-7 (2), 7-6 (5).

Casper Ruud, Norway, def. Dominic Stricker, Switzerland, 4-6, 7-5, 6-3.

Botic Van de Zandschulp, Netherlands, and Alex Michelsen, United States, def. Matej Vocel, Czechia, and Jakub Paul, Switzerland, 7-5, 6-1.

Kevin Krawietz and Tim Putz (1), Germany, def. Jakob Schnaitter and Mark Wallner, Germany, 7-6 (5), 6-3.